Box-tool for screw and forming machines.



No. 892,130. PATENTED JUNE 30, 1908.

L. s. BROWN, BOX TOOL FOR SCREW AND FORMING MACHINES.

APPLIUATION FILED JUNE 24, 1907.

W/TNESSES INVENTOFI ATTORNE nu nunm: rsrnu ca, WASIHNGTOIY, nc.

LEWIS S. BROWN, OF DERBY, CONNECTICUT.

BOX-TOOL FOR SCREW AND FORMING MACHINES.

Specification of Letters Patent.

Patented June 30, 1908.

Application filed June 24, 1907. Serial No. 380,409.

To all whom it may concern:

Be it known that I, LEWIS S. BROWN, a citizen of the United States, residing at Derby, county of New Haven, State of Connecticut, have invented a newand useful Box-Tool for Screw and Forming Machines, of which the following is a specification.

This invention relates to the class of tools commonly known as box tools and adapted for use on screw and forming machines, and has for its ob'ect to provide an entirely novel design of tool and in connection therewith a novel adjustable, single yoke rest, the tool being adapted for general use and especially ada ted for use where exceedingly accurate wor is required, as for example, an adjustment to one one-thousandth of an inch, the adjustment to different pieces of work being made in a mere fraction of the time ordinarily required for adjusting tools of this character.

With these and other objects in view I have devised the novel structure of which the following description in connection with the accompanying drawing is a specification, reference characters being used to indicate the several parts:

Figure 1 1s a front elevation of my novel tool as in use; Fig. 2 a side elevation thereof; Fig. 3 a section on the line 33 in Fig. 1 looking in the direction of the arrows; and Fig. 4 is a detail section on the line 4-4 in Fig. 2 looking in the direction of the arrows.

10 denotes the body of my novel tool and 11 the shank. Within the body is a recess 12 to receive the form or piece of work to be operated upon.

13 denotes the cutter which slides in a way 14 in the body. The cutter is provided in its underside With slots 15, either of which is adapted to be engaged by a collar 16 on an adjusting screw 17, said screw engaging a threaded hole 18 in the body. After adjustment the cutter is locked in place by a clamp 19. This clamp lies above a table 20 upon the body an l is provided at its rear end with a rounded boss 21 which engages a recess 22 in the rear end of the table.

23 denotes a locking screw which passes through the clam and engages the body. In use the rear en of the clamp is supported by the boss, making it self-leveling, and the forward end bears upon the cutter. The

cutter is locked in place after adjustment, by

means of screw 17 by tightening the clamp down upon it by means of locking screw 23.

24 denotes my novel rest as a whole. This rest consists essentially of a plate lying in front of the body and provided with a surface 25 which serves as a back rest, with a surface 26 at right angles thereto which serves as a top rest, with a tail-piece 27 and with an oblique slot 28.

29 denotes a bolt which passes through slot 28 and through the body and is provided with a nut 30 which engages the back of the body. The bolt is preferably provided with a head 31 which lies in a counter-bored recess 32 in the face of the rest. The bolt is shown as provided with a pin 33 which engages a recess 34 in the body to retain the bolt against rotation. At the upper end of the body is a housing 35 which incloses the top and sides of the tail-piece and is provided with adjusting screws 36, the inner ends of which engage the o posite sides of the tailpiece and with an a justing screw 37, the inner end of which engages the top of the tail piece, and which is provided with a set nut 38.

The operation is as follows: To set the tool for a piece of work, adjusting screws 36 and 37 are loosened, the nut is loosened on bolt 29, the clamp is loosened and the cutter drawn outward. The form or piece of work is then placed in recess 12 and the rest set to place; that is, with the surfaces forming the back rest and the top rest in engagement with the work. With my novel construction of rest there cannot be the slightest doubt but that the top and back rests will bear with equal pressure on the work. The cutter is then set to place by forward rotation of adjusting screw 17, after which the cutter is locked in place by tightening locking screw 23. Adjusting screws 36 and 37 are then set against the tail-piece and set nut 38 is tightened up and then nut 30 on bolt 29 is set down against the back of the body. The adjusting screws 36 and 37 enable me to secure the finest ossible adjustment to a minute fraction 0 an inch, and the adjustment as a whole may be effected in very much less time than is re uired in making the adjustment in any too of the character heretofore produced. Vhen the adjustment is once effected, the rest is set with absolute rigidity,

doubly secure by means of adjusting screw 37 and set nut 38.

Having thus described my invention, I claim:

l. A tool of the character described comprising a body, a housing carried by said ody provided with oppositely mounted adjusting screws, a cutter, a plate having surfaces forming back and top rests and having an oblique slot, a reduced tail piece carried by said plate and adapted to be engaged by said adjusting screws, and a bolt engaging said slot.

2. A tool of the character described comprising a body having a housing, a cutter, a rest having surfaces forming back and to rests, an oblique slot and a tail piece, a bo t engaging said slot and adjusting screws in the housing engaging the sides and end of the tail piece. 4

In testimony whereof I afIiX my signature,

in presence of two witnesses.

LEWIS S. BROWN. Witnesses:

J. A. SWIFT, DANIEL B. GIDDINGs. 

